I need to know what grade of stainless steel that MAGNAFLOW uses in their cat-back systems. the kit comes with polished tips but i wont be using them, instead, im opting for the 4th gen rectangle tips...BUT... that leaves me needing piping from the muffler back to the tips and i want it to match. seems pointless to put standard piping for the last part of the system when the rest is stainless... please let me know what grade the stainless steel is or where i can look to find out. thank you.

a few years back they designed something that sat on a wall with this crank thing on it and you could turn the crank, pick up this fance black tube and if you hold it to your head you could here someone talking.
well a while back some smarty put a dial on them and then they started making them smaller and smaller until you could carry them around in your pocket.
here tell some people actually talk to others on them little boxes just like face to face but without the bad breath.

now we are here to help every member but at time a question is a good one but you can get the info yourself and you dont even have to use the search engine on this board.

PICK UP THE LITTLE BOX FROM YOUR POCKET AND CALL MAGNAFLOW!

ok i was a little hard on you - and this is not my board and you can ask what every you want and i was a jerk to call you on it.
please accept my appologies.
back to the topic - dont be afraid to call these people they love to talk to us - we are their market. they may not have what you want but they can tell you if they have something else that will work.
and maybe someone here does no the answer to your question but the people who make it will be the ones in the know.
hope you find your answer and hope i did not put you off on 3rd gen.
sorry again.
tony

well, since there seem to be alot of people like you on message boards...internet tough guys...who love to run their mouth to feel important, significant or cause mommy didnt let you suck on her tit long enough when you were a kid..

heres a big internet GO **** YOURSELF..

i will gladly stoop to your level and i dont need your apology for your flagrant sarcasm when i ask a legimate question. i ask people here cause they are knowledgable on the topic, and i trust enthusiasts opinions more than i trust manufacturer's claims of their own products..which is why i dont care what magnaflow has to say directly.

thats all. to everyone else on the site, sorry you had to read that.

Magnaflow uses 409 Stainless for their pipes, tips are 304 Stainless.

Whoa calm down fellow. He just made a little joke, then followed up by an apology and then backed up his reasoning behind his sarcasm. Unless you already knew that calling the company wasn't going to give you the answer then there was no need coming and blowing that much smoke from your tailpipe.

Are you sure? 409 is titanium stabilized ferritic steel, in other words..it's the "stainless" that stains, the magnetic kind used for high heat applications like cat cons and commonly seen in OEM exhaust manifolds. it scales and looks ugly. I have used some magnaflow stuff, one is under a 428 mustang and the stainless is a 3xx type,

"There is no such thing as a stupid question.
There is however, an abundance of inquisitive idiots."

Seriously dude, you have enough posts to recognize that:
* thin skin is like fear -- the animals on this board can smell it.
* the level of talent here is exceeded only by the quantity of gas-bags.


All that being said, I don't think there are that many variants in
s-s muffler pipe. I'll bet a good, independent
muffler shop can help you get what you want, without getting bogged
down in s-s metallurgical rabbit holes.

Good luck, & don't hold a grudge.
Cause I'll bet one day you'll have the indispensible nugget of wisdom,
that one of us idiots seeks.

If you think there are not that many variants in stainless steels then you have no business giving input here. Stainless steel is not just stainless steel, there is a world of difference between different stainless variants from corrosion resistance to weldability, cold workability (bending) and so on.

Since this is back at the top, I'll respond to this.

Magnaflow uses 400-series exhaust-grade stainless steel as opposed to the commonly used 304 grade. The company reports experience with the 304 grade "springing back" after it has been bent into shape, causing fitment problems.

409 is a titanium stabilised ferritic stainless steel. Although regarded as a general-purpose chromium stainless steel the primary application for Grade 409 is automotive exhaust systems. Its applications are those where appearance is a secondary consideration to mechanical properties and corrosion resistance and where some weldability is required.

Myself, I wouldn't buy a magnaflow system again. I do still use their bullet mufflers but that's it. The fit and finish on a magnaflow system for the 69 Mustang 428 CJ was far from perfect, in fact it was crap. The pipes are pretty thin gauge, I normally use brushed 308 or gigher quality pipe and use lengths and weld els to custom build these systems. Needless to say, I had to redo almost the entire system to make it fit properly. Pretty crappy deal considering what it cost. Those band clamps are a joke for sure and the X pipe was leaking right out of the box (carbon traces). I fixed it by using V band clamps and welding the rest of the system up. You can see the amount of modification needed by all the TIG welds. These pics don't even show the over the axle portion, which was worst of all. The bends didn't even come close to fitting, either hitting the floor, the shocks or the sway bar....junk!

I normally put in my , and then refrain if it becomes
a urinating olympiad. This time will be an exception.

twin-turbo, I commend you on your welding/fabrication skills --
that is an excellent looking job you've done there.
But keep site of the original issue -- grafting other tips onto the
Magnaflow system. My assertion about the varieties (or lack
thereof) of s-s exhaust pipe WAS confirmed, and that a relatively
simple solution to the original problem, doesn't needto get bogged
down in s-s metallurgical theory.

All that being said, how much would you charge to fab-up some
connections from y-pipe to cat? That is REALLY nice work.